JPS62192486A - Production of dried and preheated coal - Google Patents
Production of dried and preheated coalInfo
- Publication number
- JPS62192486A JPS62192486A JP3474186A JP3474186A JPS62192486A JP S62192486 A JPS62192486 A JP S62192486A JP 3474186 A JP3474186 A JP 3474186A JP 3474186 A JP3474186 A JP 3474186A JP S62192486 A JPS62192486 A JP S62192486A
- Authority
- JP
- Japan
- Prior art keywords
- coal
- particles
- pseudo
- fine particles
- size
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003245 coal Substances 0.000 title claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000002245 particle Substances 0.000 claims abstract description 30
- 239000000428 dust Substances 0.000 claims abstract description 27
- 239000010419 fine particle Substances 0.000 claims abstract description 25
- 239000000571 coke Substances 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 11
- 239000011230 binding agent Substances 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 15
- 239000013618 particulate matter Substances 0.000 claims description 12
- 239000008187 granular material Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 239000000295 fuel oil Substances 0.000 description 5
- 239000002817 coal dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001066 destructive effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000011236 particulate material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Coke Industry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、コークス製造プロセスの一環として、コーク
ス炉に装入する乾燥、予熱炭を製造する方法の改良に関
する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a method for producing dry, preheated coal to be charged into a coke oven as part of the coke production process.
（従来の技術）
近年、コークス炉においては、コークスの品質向上によ
る高価な良質粘結炭の節減およびコークス炉の生産性向
上を目的として、コークス炉に乾燥炭、予熱炭を装入す
る方法が採用されつつある。(Prior art) In recent years, in coke ovens, a method of charging dry coal and preheated coal into coke ovens has been introduced with the aim of improving the quality of coke, reducing the need for expensive high-quality caking coal, and improving productivity of coke ovens. It is being adopted.
この方法においては、乾燥炭、予熱炭のいずれも水分が
通常の装入炭よシ少いか、殆んど含まれないため、乾燥
、予熱炭の一部の微粒子が、輸送時、コークス炉装入時
に飛散して発じんし、またコークス炉中での乾留時に発
生するガスやタールに同伴されてコークス炉ガス導管に
はいるという、いわゆるキャリーオーバ現象を増大させ
る。この午ヤリーオーバされた石炭粉は最終曲にはター
ル中の固形分、灰分を増大させて好ましくない結果を招
く。In this method, both dry coal and preheated coal contain less or almost no moisture than normal charged coal, so some of the fine particles in the dry and preheated coal are transferred to the coke oven during transportation. This increases the so-called carry-over phenomenon, in which it scatters and generates dust when entering the coke oven, and enters the coke oven gas pipe along with gas and tar generated during carbonization in the coke oven. In the final stage, the coal powder that has been overcoated increases the solid content and ash content of the tar, resulting in unfavorable results.
このキャリーオーバ対策の従来技術としては、特開昭５
５−１４９５８２中に言及されているように、サイクロ
ンで分離された微粉炭にタールを添加して、キャリーオ
ーバ量をある程度抑制できる。As a conventional technique to prevent this carryover,
5-149582, the amount of carryover can be suppressed to some extent by adding tar to the pulverized coal separated by a cyclone.
また特開昭５５−４８２８４には、炭じんを分離後：て
それに結合剤を添加し、ペレット化する方法が開示され
ている。Furthermore, JP-A-55-48284 discloses a method of separating coal dust and then adding a binder thereto to form pellets.
（発明が解決しようとする問題点）
前記の特開昭５５−１４９５８２の対策ではキヤ＋７
＋オーバ量が完全になくなる訳はない。これは微粒子の
擬似粒子化物が完全に破壊されていないためその分離が
完全でなく、サイクロンで分級芒れた粗粒子部分にはこ
の擬似粒子化物が含まれ、これに対してはタールは添加
されておらず、この分の微粒子がキャリーオーバの原因
となるからである。(Problem to be solved by the invention) The countermeasure of the above-mentioned Japanese Patent Application Laid-Open No. 55-149582 has a +7
+ There is no way that the amount of excess will be completely eliminated. This is because the pseudo-particulate matter of the fine particles is not completely destroyed, so the separation is not complete, and the coarse particles classified by the cyclone contain this pseudo-particulate matter, and tar is not added to it. This is because this amount of fine particles causes carryover.
特開昭５５−４８２８４は炭じんの分離には重力分級器
または重力篩を用い炭じん発生を減少させることを目的
とするに過ぎず、擬似粒子化物の完全破壊、微粒子の完
全分離は行なわれず、前同様にキャリーオーバは充分に
防止きれない。JP-A-55-48284 merely aims to reduce the generation of coal dust by using a gravity classifier or a gravity sieve to separate coal dust, but does not completely destroy pseudo particles or completely separate fine particles. , As before, carryover cannot be prevented sufficiently.
本発明は従来技術のこれら問題点に解決を与え、乾燥炭
、予熱炭を用いてコークスを製造する際に、その微粉体
部分が発じん、キャリーオーバとなり、石炭の損失、環
境の悪化、化成品えの悪影響を防止する技術を提供する
ことを目的とする。The present invention provides a solution to these problems of the prior art, and when producing coke using dry coal or preheated coal, the fine powder part generates dust and causes carryover, resulting in loss of coal, environmental deterioration, and carbon pollution. The purpose is to provide technology that prevents negative effects on product quality.
（問題点を解決するための手段）
前記目的は、本発明によシ、石炭に乾燥、予熱を与え、
次いで発じんの原因となるサイズの石炭の微粒子部の擬
似粒子化物を乾燥、予熱およびその後の工程において完
全に破壊し、かつこれら微粒子を発じんしないサイズの
石炭の粒子部と完全に分離することにより達成される。(Means for Solving the Problems) According to the present invention, the above object is to dry and preheat coal,
Next, the pseudo-particulate matter of the coal particles of a size that causes dust generation is completely destroyed in drying, preheating, and subsequent steps, and these fine particles are completely separated from the coal particles of a size that does not generate dust. This is achieved by
この完全破壊、完全分離した微粒子には重油等のバイン
ダーを配加し機械的操作により擬似粒子化物とし、これ
を微粒子完全分離後の発じんしないサイズの石炭の粒子
部とともにコークス炉に装入する。A binder such as heavy oil is added to the completely destroyed and completely separated fine particles, which is then mechanically manipulated to form pseudo-granules, which are then charged into a coke oven together with coal particles of a size that does not emit dust after the fine particles have been completely separated. .
以下、本発明を添付図によって具体的に説明する。Hereinafter, the present invention will be specifically explained with reference to the accompanying drawings.
第４図は乾燥前の石炭のうち小粒子のものの性状を模型
的に示し、発じんしない大サイズの粒子（１）と発しん
可能な小サイズの微粒子（２）がちるが、との微粒子（
２） Ｆｉ水分によシ集合態の擬似粒子化物（３）とな
ったり、粒子（１）に付着したりしていて、この状態で
は発じんしない。第５図はこの石炭を乾燥した状態での
性状を示し、擬似粒子化物（３）の一部は崩壊して単離
した微粒子（２ａ）となるが、他部は擬似粒子化物（５
ａ）として残存する。従来技術では崩壊微粒子（２ａ）
が分離されるだけで、残る擬似粒子化物（３ａ）は結合
力が全く弱いため、輸送工程、コークス炉装入時に崩壊
して発じんの原因となる。Figure 4 schematically shows the properties of small particles of coal before drying.
2) Fi is turned into pseudo-particulate matter (3) in agglomerated form by moisture, or is attached to particles (1), and no dust is generated in this state. Figure 5 shows the properties of this coal in a dry state. A part of the pseudo-particulate matter (3) disintegrates and becomes isolated fine particles (2a), while the other part shows the properties of the pseudo-particulate matter (5).
It remains as a). In the conventional technology, disintegrated fine particles (2a)
is only separated, and the remaining pseudo-particulate matter (3a) has a completely weak binding force, so it disintegrates during the transportation process and during charging into a coke oven, causing dust generation.
本発明では、第１図に示すように、乾燥、予熱およびそ
の後過程において、発じんの原因となるサイズの石炭の
微粒子部の擬似粒子化物（３）（５ａ）を完全に破壊し
て単離した微粒子（２ｂ）とし、かつこれを発じんしな
い石炭の粒子部（１ｈ）と完全に分離する。In the present invention, as shown in Fig. 1, during drying, preheating, and subsequent processes, pseudo-particulate matter (3) (5a) of coal fine particles of a size that causes dust generation is completely destroyed and isolated. fine particles (2b), which are completely separated from the coal particles (1h) that do not emit dust.
そしてこの完全破壊、完全分離微粒子部（２ｂ）に対し
重油等のバインダー（４）を配加し、転勤、圧縮等の機
械的操作（５）を加えて再集合した擬似粒子化物（３ｂ
）とし、これを発じんしないサイズの粒子部（１ｂ）と
混合してコークス炉に装入する。Then, a binder (4) such as heavy oil is added to this completely destroyed and completely separated particulate part (2b), and mechanical operations (5) such as transfer and compression are applied to reassemble the pseudo particulate material (3b).
), and this is mixed with the particle part (1b) of a size that does not generate dust and charged into a coke oven.
第２図は本発明方法を含む具体的工程の１例を示すブロ
ック図である。装入する湿炭（６）の乾燥のため例えば
流動層式の乾燥機（７）を用いる場合は、その層内に攪
拌Ｒ（８）を設け、前段階では石炭の乾燥を、後段階で
は主として擬似粒子化物（３） （＋ａ）の破壊、分級
を行うゾーンとする。FIG. 2 is a block diagram showing one example of specific steps including the method of the present invention. For example, when using a fluidized bed dryer (7) to dry the wet coal (6) to be charged, a stirring R (8) is provided in the bed to dry the coal in the earlier stage and dry the coal in the later stage. This zone is mainly used to destroy and classify pseudo-particulate matter (3) (+a).
流動層の運転条件によシこれらの操作を制御することが
でき、例えば乾燥ゾーン（７ａ）に該当させるところは
風速を低目に、そして破壊分級ゾーン（７ｂ）に該当さ
せるところは風速を若干高目に設定する。乾燥機（７）
中に完全な後者ゾーン（７ｂ）を設けることができない
場合完全破壊微粒子（２ｂ）の完全分離のため例えば後
続の集じん機（９）にその役割を分担させることができ
る。These operations can be controlled depending on the operating conditions of the fluidized bed. For example, the wind speed may be lowered in the drying zone (7a), and the wind speed may be slightly lowered in the destructive classification zone (7b). Set it high. Dryer (7)
If it is not possible to provide a complete latter zone (7b) inside, the role can be assigned to, for example, a subsequent dust collector (9) for complete separation of the completely destroyed particles (2b).
完全分離した単離微粒子（２ｂ）にはニーダ−００にお
いてバインダー（４）を配加し、ニーダ−の機械的操作
によシ再集合させて擬似粒子化物（３ｄ）とし、乾燥機
で分離された発じんしないサイズの石炭の粒子部（１ｂ
）と混合し、コークス炉συに装入する。A binder (4) is added to the completely separated isolated fine particles (2b) in a kneader 00, and the particles are reassembled by mechanical operation of the kneader to form a pseudo-particulate material (3d), which is then separated in a dryer. Coal particles of a size that does not emit dust (1b
) and charged into the coke oven συ.
上記工程で、乾燥機の分級ゾーン（７ｂ）、集じん機α
０で分離する微粒子（２ｂ）のサイズは、コークス炉σ
υでのガス流速によシ同伴される粒子サイズが７０μｍ
以下であることから、安全を見込んで１００μｍ以下に
設定するのが適切でめる。In the above process, the classification zone (7b) of the dryer, the dust collector α
The size of the fine particles (2b) separated at 0 is the coke oven σ
The particle size entrained by the gas flow rate at υ is 70 μm.
From the following, it is appropriate to set the thickness to 100 μm or less in consideration of safety.
そして微粒子（２ｂ）に添加するバインダ−＋４１１ｉ
前記１００μｍ以上のサイズの擬似粒子化物（５ｂ）が
形成でき、かつハンドリングの途中等において発じんす
る粒子サイズに破壊されない種類のものであればよく、
またそΩ添加量はコスト的にも少量が望ましく、例えば
重油を用いた場合は、微粒子（２ｂ）量に対して２チ程
度、添加すれば足る。And binder +411i added to fine particles (2b)
Any material may be used as long as it can form pseudo-particulate matter (5b) with a size of 100 μm or more and is not destroyed by the particle size generated during handling, etc.
Also, it is desirable to add a small amount of Ω from the viewpoint of cost. For example, when heavy oil is used, it is sufficient to add about 2 Ω to the amount of fine particles (2b).
第３図は第２図の本発明を含む工程に従って処理した石
炭の発じん性をＡＳＴＭの発じん性測定装置を用いて試
験した結果で、横軸に重油添加量（咽をとり、縦軸に発
しん濃度（ｇ／ｎ〆）をとって示したものである。重油
２％の添加でその石炭の発しん性が全くなくなることが
知られる。Fig. 3 shows the results of testing the dust emitting properties of coal treated according to the process including the present invention shown in Fig. 2 using an ASTM dust emitting property measuring device. It is shown by taking the oxidation concentration (g/n〆) for coal.It is known that the addition of 2% heavy oil completely eliminates the oxidation properties of the coal.
これは、図中に参考のため記入した水分が８％の石炭の
発しん性に等しいことがわかる。It can be seen that this is equivalent to the emissivity of coal with a moisture content of 8%, which is entered for reference in the figure.
また実炉において測定したキャリーオーバ澄は、湿炭水
分８％程度で０．１ ＴＯＮ ／ １００’ｌｌ’ＯＮ
装入炭でアシ、本発明方法によるものも０．１ ＴＣＮ
／１００ＴＯＮ装入炭と同程度の結果を得た。In addition, the carryover clearness measured in an actual furnace is 0.1 TON / 100'll'ON at a wet coal moisture content of about 8%.
Charging coal has a reed, and the method of the present invention also has 0.1 TCN
/100 TON of coal was obtained.
（発明の効果）
以上のように、本発明の乾燥、予熱炭の製造方法による
と、発しんを完全に抑制することができ、石炭の損失、
環境の悪化、化成品への悪影響等の問題を解決できる。(Effects of the Invention) As described above, according to the drying and preheating coal manufacturing method of the present invention, it is possible to completely suppress bleeds, reduce coal loss,
Problems such as environmental deterioration and adverse effects on chemical products can be solved.
第１図は本発明方法を含む処理過程を模型的に示す図、
第２図は本発明方法を含む具体的工程の１例のフローを
示すブロック図、第３図は、本発明方法を経て処理した
石炭の重油バインダー添加量と発しん濃度との関係を示
す図、第４図は乾燥前の石炭の粒子性状を示す図、第５
川は乾燥した状態での石炭の粒子性状を示す図である。
（１） （Ｉｂ）・・発じんしないサイズの石炭の粒子
、＋２） （２ａ）（２ｂ）・・発じんの原因となるサ
イズの石炭Ｏ微粒子、［３） （３ａＸ５ｂ） ・擬似
粒子化物、＋４） −−バインダー、（５）・・機械的
操作、（６）・・湿炭、（７）・・乾燥機、（７ａ）・
・乾燥ゾーン、（７ｂ）・・破壊分級ゾーン、（８）・
・攪拌翼、（９）・・集じん機、αＯ・・ニーダ−１ｑ
υ・ψコークス炉。FIG. 1 is a diagram schematically showing a treatment process including the method of the present invention;
FIG. 2 is a block diagram showing the flow of one example of a specific process including the method of the present invention, and FIG. 3 is a diagram showing the relationship between the amount of heavy oil binder added and the emission concentration of coal treated through the method of the present invention. Figure 4 shows the particle properties of coal before drying, Figure 5
The river is a diagram showing the particle properties of coal in a dry state. (1) (Ib) ... Coal particles of a size that does not generate dust, +2) (2a) (2b) ... Coal O fine particles of a size that causes dust generation, [3) (3aX5b) - Pseudo-particulate matter, +4) --Binder, (5)...Mechanical operation, (6)...Wet coal, (7)...Dryer, (7a)...
・Drying zone, (7b)...Destructive classification zone, (8)・
- Stirring blade, (9)... Dust collector, αO... Kneader-1q
υ/ψ coke oven.
Claims (3)
て、発じんの原因となるサイズの石炭の微粒子部の擬似
粒子化物を乾燥、予熱およびその後の工程において完全
に破壊し、かつ発じんしないサイズの石炭の粒子部と完
全に分離することを特徴とする乾燥、予熱炭の製造方法
。(1) In the production of drying and preheating coal to be charged into a coke oven, pseudo-particulate matter of fine particles of coal of a size that causes dust generation is completely destroyed in the drying, preheating and subsequent processes, and dust generation is avoided. A method for producing dry and preheated coal, which is characterized by completely separating it from coal particles of a size that is not large.
て、そのサイズの石炭の微粒子部の前記分離を行う特許
請求の範囲第１項記載の乾燥、予熱炭の製造方法。(2) The method for producing dry and preheated coal according to claim 1, wherein the particle size of coal that causes dust generation is set to 100 μm or less, and the separation of the fine particles of coal of that size is performed.
微粒子部にバインダーを加え、転動または圧縮により１
００μｍ以上の擬似粒子化物に形成し、これを発じんし
ないサイズの石炭の粒子部と混合する特許請求の範囲第
１項記載の乾燥、予熱炭の製造方法。(3) Add a binder to the fine particles of coal of a size that causes dust generation after separation, and 1
2. The method for producing dry and preheated coal according to claim 1, wherein the pseudo granules are formed into particles of 00 μm or more and mixed with coal particles of a size that does not generate dust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3474186A JPS62192486A (en) | 1986-02-18 | 1986-02-18 | Production of dried and preheated coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3474186A JPS62192486A (en) | 1986-02-18 | 1986-02-18 | Production of dried and preheated coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62192486A true JPS62192486A (en) | 1987-08-24 |
Family
ID=12422744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3474186A Pending JPS62192486A (en) | 1986-02-18 | 1986-02-18 | Production of dried and preheated coal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62192486A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7389974B2 (en) | 2003-03-14 | 2008-06-24 | Commissariat A L'energie Atomique | Screw, nut and cable transmission |
| US7574939B2 (en) | 2003-03-14 | 2009-08-18 | Commissariat A L'energie Atomique | Intermediate segment of an articulated arm comprising a screw and nut transmission |
-
1986
- 1986-02-18 JP JP3474186A patent/JPS62192486A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7389974B2 (en) | 2003-03-14 | 2008-06-24 | Commissariat A L'energie Atomique | Screw, nut and cable transmission |
| US7574939B2 (en) | 2003-03-14 | 2009-08-18 | Commissariat A L'energie Atomique | Intermediate segment of an articulated arm comprising a screw and nut transmission |
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